I don't know if I have your email - but, if you just follow this link - the street view shows that Harrison St is NOT continuous and has a break here - and until about 2 weeks ago, Google Maps reflected that correctly. But now, it acts as if you can drive over that park...

http://maps.google.com.au/?ie=UTF8&ll=-37.759434,144.980757&spn=0.006336,0.013905&z=17&layer=c&cbll=-37.760746,144.980768&panoid=_i0yyYE7JWWTi1sWKO1YXg&cbp=1,167.72885736442095,,0,5